IT8448228A1 - DEVICE FOR FORMING AND INSERTING AN INNER LID INTO A CONTAINER - Google Patents

Description

Description of the invention having for_tjto.l.oj _ _Cl CZam/_6j336 ["DEVICE FOR FORMING AND INSERTING?_?.?_?0_O_I A

COPERCHIQ__INTERN0_J_N_UN_CON/LE.NJJ0RE"

name__of_the_Jlitta

ESSELTE PACAKTIEBOLAG

a J?rfaila ,_Sv?zj_a

Inventor: Mr. Inqemar Boqren

SUMMARY

? Device for inserting an internal lid? u> <S 25O (6,7) into a tubular container (1) and for connecting it

L I?*J>-IQ2 hermetically sealed lid inside the

?s or tubular body of the container by welding at ?5 =>.e=> 1 - <?>-QT ? O <constant heat, high frequency or ultrasonic and <s> 1(L:omprising a carrier plate (8) which holds

1 1i1 tubular body (1) while it is introduced and sal-?cl.at the cover (6,7J_ , a support provided on the

Isopir? deX support (8) to position a rough piece

)lid plate, shaped by cutting.having^

an outer circumference greater than the circumference

internal of the tubular body, a piston means (161)

which presses the rough piece of lid into the tubular body by bending a narrow edge of the J>ojrdo_(7)_in the direction of

upwards from the lid plane (6) and j_n which

the piston means comprises a lower part

1 d i- -S t a n t u f. f_0- 418-)_ .e.d_u. n.a. _ p.a.r.te_s .u p.e r.Lo.r e_d.l _ s t.a n t u.f_lo

II?

_(-( 20 ) eh e son o mob 11 i_ a-ss-i.alme.nt e -Li a a_r_LS.p e t.t.o_. al lai

ia1-tra ed., an expandable medium (19) between said two..para Iti.

i

+di...piston (18, 20_) .me.z.zD--e.s.p.a.n^.i.b-Ll-e..-c.b.e_?.-.p.remui

I

to radially towards..1<1>este_r.n.o.when l_e__du.e_parti....d_i .

|s.t.antuffo (.18,2.0.) are compressed. The bottom_of_the_part

linferior.e_.di_stantuffo 418)_?_do.ta.to_diun subLI_e_

Lb.o.rd.o_p.remente (21) .having a_..surface_i_eJ_n.cji_nat._a

[(24)_in__d_i_c.ez.i.o.ne. outwards and downwards. <'>o QZ-<*> which in its internal part is directly connected to. a volute (22).. the upper part (201 of the piston- 52 O ?*-_f.o_, which in the bottom is cup-shaped. (.25)_,_?_movable_ axially on the lower part (_18) of the piston_ ? > to come into..contact__with the expandable medium (19)

and move away from it. The expandable medium is preferably a rubber ring (23), the shape of which varies when the upper and lower piston parts are compressed, so that on the rubber ring

a direct pressure line (26) is exerted

mind outwards according to which 1?ring is

engage with the edge (7) of the lid folded towards

the top and adjacent to the cover plane (6). The bearing plate (8) and the pressing piston (16) have

t

substantially parallel cylindrical sides, so that the welding pressure is practically only provided

from the_expandable_middle ...(19.). within, the area, of the middle _

1(.10) of the bearing plate suitable for providing heat

of welding, _

(F?g#_6)

DESCRIPTION

The present invention relates to a device for _

_?a forming, for the insertion of an internal cover into a tubular cardboard body of any other

sCP ?5 material having equivalent properties, and resistance

za, e. for the hermetically sealed connection of the cover ? CO E- <l >a> ^ C hio, to the internal surface of the tubular body, by means of constant heat welding, high frequency welding or ultrasonic welding and comprising ? > a bearing plate for supporting the tubular body while, inside it is inserted and connected, for welding the cover, a support for positioning a blank flat cover piece shaped by punching, having an external circumference greater than that of the tubular body, a piston means for forcing said blank cover piece into the

tubular body, an operation during which a

b}ordo of the rough piece of lid s? bend<' >verso

The?high, the piston-shaped medium<~>comprising a part

The lower and upper parts which are axially movable with respect to each other and, between the two

parts, an expandable medium, which is pressed radially

Lle,nt<T>e verses the<1>estern<.>o when the two parts of piston??

fo si s m o s t ano_asi ss ialment e 1?? una y e r s p l<3>altra. ?

A slide of the type defined above is known thanks to

1^to a hreyet1o_ syedese of the same author of the prer

s.ente invention (patent application No. 81000533^0 equivalent to U.S. application No. 414,056)*

The breyetto shows a device in which both the stani

uffo and that the plate carrying the tube body

fi 5 The sides of the container are at least slightly widened =E < i conically in proximity to the area where the co f .-<?>-y-Oas? ^ ?*>

? zz <f>?Oc-M=cJ -2e: the ring must be inserted into the tubular body and WJ or welded to the internal surface of the same, The bre^^_

(3 to yetto cited deals mainly with containers having ? > m base material of cardboard or similar,

gl ? yjsto that the conical hole of the piston presses?

and the bearing plate is not necessary, indeed in

some cases can cause problems in the manufacturing of containers made of rigid cardboard or

I : <?>T <?>

a bulky carton, These inconveniences r?fe-r

I especially respond to problems of hermetic sealing

in the junction between the edge of the lid and the tubular body, the difficulties may also concern !^e-<

correct adjustment of the position of the pressing piston. In the case of a slightly too high po^

position of the piston. pressing with respect to the cone, of the carrier plate, the contact pressure between the _ DO.rdp._of the cover and the tubular body is too

low and the joint, especially the one for welding?!

ture, between the two parts becomes imperfect and can cause a poor seal. On the other hand, in the case, .dj?:

1too low a position of the pressing piston,

.'1? contact_.pressure? too high? what?

ensure that the joint material, for example, weldable plastic material, is pressed out of the joint, so that a thickness of 1 mm is created in the pressure joint.

j |

..too little material, and also with the risk

That it burns. In both cases, the

? .danger of a bad seal,

<?>Furthermore, by forcing . the lid at the 11.-<1 >ends of the cor-'..

Tubular PO, folds inevitably appear, and ri-V<?i >p <F>e<lij>ua <31r>o<t>onaneAM<K>^ -tirl_in the .hordo._o_o.ed. lid, folded _towards .the^ajLto. by which. the lid is connected ? to the body

, . . . . . the tubular.,. .These, folds or shrinkages become, as j

D?O, determine how much, greater _? the thickness _of the never

<' >. . . the battlements, in the lid., and furthermore the. .size, of. such folds and withdrawals increases with the increase in direction?..

.room from the surface,..of., bottom of the lid,.The

i

joint, especially the welded one, between the edge

i i

(The lid and the internal surface of the body..tube^i

-lare, should therefore be located as close as possible to the bottom of the lid, and at the same time

the height of the lid edge can be reduced.

Also taking into account the consumption of material and the aim is to use the maximum possible volume.

1inside the container tube, it is desirable that

I- :<?>the hem of_jpoper?o_is as low as possible. In the

previous patent cited above by the same author

-the welding of the cover to the tubular body? is realised-?

is placed over a relatively large portion of the lid edge height, while the metal ring for achieving constant heat welding -?<? >-S high frequency welding or ultrasonic welding is provided relatively close to the lid edge.

1top of the <1>lid rim,

to achieve a satisfactory and

hermetic seal? It is important that the pressure between the

oirl_o of lid and the tubular body is maintained

'between certain minimum and maximum levels of pressure-f

Too low a pressure causes an imperfect weld joint and the risk of poor te7

flow, while, too high a pressure can cause compression.]7

to remove a part of the weldable material outside the joint area, thus giving rise to an imperfect joint, the so-called through-burn of the ma'

_ material..and the consequent poor seal and risk of

Derdite, The piston therefore must be moved

downwards to a very precise lower position, where exactly the

preset pressure. The required pressure, common

. . j

which, however, can vary depending on the variations

of the thickness of the cardboard material from which the container and the lid are made, and on the basis of other external circumstances.

(Jk? .Obviously, it has not been thought possible up to now to make a satisfactory welded joint unless the plat- .-rt u?J O S

} ? ?En ?U; c n-l(0 or bearing, below the piston, is coni-.

Jca so that a pressure surface is obtained - *SS ?3

? ? .2 extending along the entire height of the hem of the co~j & > perchip folded upwards, Unexpectedly, all

However, it has been found that an improved g?un-I is obtained ? ? T<' . ?? ??"" . >i

,to._ welded if the contact surface of the welding?

_ between the lid edge folded upwards and the internal surface of the tubular body is made thicker than the height of the lid edge, and it is also possible to obtain a satisfactory welded joint.

by means of a pressure surface, reduced almost

to a line, by the expandable medium of the

? piston,_ _ _ _ _ _

In this way it was shown that there was a pressing piston.

cylindrical with completely parallel sides, agent

against an at least substantially parallel cylindrical surface of the tubular body, gives improved reliability of hermetic seal between the lid edge and the tubular body, and has been eliminated

1<1>disadvantage of having too low blood pressure

or too high for the plunger to move

downwards respectively by a distance that is too short and by a distance that is too large. At the same time, it is possible to very carefully adjust the position of the solder joint in the lid edge, and give it a uO?

<">?-? ^ Q I give the pressing piston a particular design, the t.s? =2 ? c .0S ~ a soldering joint can be located very close & > To the bottom portion of the lid edge, that is

that is to say near the actual surface of the lid, In order to obtain that the expandable medium

d!ello<~ >stantuffe preveme.nte operate as close as possible ??

s Iih?le at the bottom of the lid rim, at the bottom and at the top of the pressing piston

you., however., it is necessary to give a particular design, which I will describe in detail later.

1The purpose of the invention is therefore to solve the problem of creating a device for forming

and the insertion of an internal cover into a body

<;>container hulorate, device structured in

T- 9.?

so that the lid can be arranged _

and welded practically everywhere inside the tubular body and without the danger that the pre-eminent piston gives rise to too low or too high a pressure of the lid edge in relation to the body

tube of the container, the solder joint can be located very close to the portion of

of the lid edge, position where the folds

f<.>withdrawals<?>have a<.>small dimension. In<.>ta<.>l way i<~>l aos.._ r , - - ? - <" ? >: <? ? >device is substantially simpler than that ?

-cpreviously known and in particular one obtains cJ? or .3? or _?t aS ? a substantially increased reliability against the

s='W poor seal in the container, > here the invention concerns a tool for the hermetically sealed assembly of an internal lid, having a folded edge upwards, in the <1>end of a container made of cardboard and of a material with equivalent resistance characteristics, the tool being constructed in such a way that the

and Il-iminati-i problems of a c-onta-ct of pre:s-sion<.>tr-op

t . <. " .. ? >? :

F i soft and too hard between the lid edge and

the internal surface of the tubular body and is eliminated?*

the problem of downward displacement has been undermined

The piston in a lower position determines

with great precision, the instrument being designed

JLU v

j^ato so that a satisfactory and hermetically sealed solder joint is obtained, under all circumstances

[if it occurs, between the edge of the lid and the top

-f ?e?e internal of the tubular body. Let the plate por?

j^ante that the piston have substantially re sides

t?l?nei for which the welding pressure is supplied

1 in practice completely from the expandable medium, valid)

that is to say within the area of the middle of the bearing plate

|which supplies the welding heat. This second ????

or ? a ring of conductive material that extends U?J ?*-i?j f <1 >? 11r???ii RI inside the entire carrier plate and provides a sur

? UJ contact surface with the external surface of the c<j>r?'* - i el?.0i3

?=or tubular, while the expandable medium is a rubber ring ?5> which in the non-expansion state is located slightly inside the external surface of the

imitating verse the bottom of the piston, so you don't

There is no danger of the ring getting stuck or caught between the piston and the lid rim.

Further features of the invention will be any

as is evident from the following detailed description;

in_ c_ui_.si;XarL reference to the attached drawings,

your drawings:_ __ _ _

ia^JFig, 1 ? a perspective view of a container

Igia ready? Made using a device according to

>1'.invention;. . _

f 11 ?r

?Fig. 2 is a vertical cross-section of such a container.

?The F?g, 3 shows schematically in section trasyersjt

a lid forming device according to the invention; __

ia Fig. 4 shows a cross-section of a piston?^

pressing force included in the device of Fig* 3;_

Fig. 5 is a more detailed view on an enlarged scale of a portion of the pusher piston _ _I2 according to Fig. 4, in the phase of introduction of the co?? - |Siil,-L? at 5?7 BX IC circle inside the tubular body of the container; and J s |

- -o-e S= cu Fig, 6 similar to the previous one,_ shows the piston pressing during the welding operation,_

Jar or container made using the

device according to the invention comprises a sleeve

or tubular body of cardboard or rigid material

?milar obtained from a flat band of material, ?

whose edges have been joined according to a longitudinal junction 2, the tubular body being provided,

At the top, there is an internal lid 3 and, at the bottom,

d? a corresponding internal caseback. In the form of

the illustrated reveal<~>a,<. >the upper edge <.>4 of the

_ container? "curling"? folded inward

T ?d. -

to create a uniform and homogeneous ?end? of the

^container that covers the edge of the lid and gives sta- _

: h0ilit? to the container at both its ends?

In the case illustrated the container is cylindrical, but

the natural one that the container can have, a shape _d?

;cross-section, any p?ligonal, or different, :*at*?

|to so that the edges of the polygon are rounded

ti.,_The lid and the bottom are obtained from,.

a 5-piece flat rough piece shaped by cutting,

jche_,p_rima.d? to be pressed downwards into the..body

_ _ tubular, of the container or connected to it, is_|on ? cs or f_,? =c *-? or t g s formed in a lid plane 6 and from this, it. develops-

n _ aa a lid edge circumferentially and towards_ ?S >

_ Rialto, as best shown in Figs. 5 and 6, and respec-

_ downwards for the bottom, As above

_ mentioned? It is desirable to have a 7 cm lid edge

_ as low as possible, in order to obtain the <3i>O<A>M<rt>-

_ Ijuant?t?.as little waste as possible and also pe:?

_ Doter use the maximum internal yolume possible

_ her container. Given that the solder joint between

_ lid edge and the internal surface of the container

_ nitore .? located as close as possible to the...floor..d?. .

]<'>bottom, 6 of the, lid, 1*rim....7_.of lid can? be^

_ be made lower than possible, in pre-_

_ _ yield, without negatively affecting the er-_ ;

^ -IO *

neticaj?eJL container,

E1 device shown in Fig, J> comprises_ima

carrier plate to support the sleeve or body

tubular 1 of the container, when the lid is for

_mato and ?_connected by welding to the tubular body,

_ The carrier plate 8 has substantially the same_

_ external shape of the tubular body 1, but in the part

jfcnferiore ? provided with a guide cone 9 to make

It is easy to introduce the tubular body 1 from below the supporting plate. The plate is also provided with an annular welding tool 10 which is, preferably, a ring to transmit the heat produced.

3. High frequency or ultrasonic welding of the cover and/or tubular body?

king? In order to allow the tubular body part, located above the welding tool_

<?>f10, d? expand slightly during the operation

welding, the welding tool 10_?_preferably

_ _^a slightly widened in the upward direction,_

The taper-11 of the welding tool 10 is very

small and can hardly be noticed by eye

naked, the angle of conicity can be understood _

between 2<a >and 6?, From the upper edge of the sai' tool?

i

d<.>

nature <. >.<'T"T'? . "??. >I

<e >ne.11% djrezlpne -verso l'alto, the plate por?'? tante 8 widens into a parallel cylinder 12, the

circumference of which coincides with the upper edge of the welding tool_10, This part widens

fta 12 can be provided with a shoulder for rea

create a stop edge that defines the position

maximum upper limit of the tubular body of the container in the load-bearing platef _ _ _

At the top of the carrier plate 8 is mounted a

lid shaping tool, which includes

jun support disk 13 with a hole, on which ? dir?

or I move the lid blank, while underneath the support disk 13 there is another support disk 14 with rounded upper edges. In order to make it possible to make the cover,

1 ?s> ^the circumferential edgej the rough piece 5. of covers,no

must be slightly wider than the internal area

Xde1 body, .tubular. l_.ed the hole of the support disk ... fco. 13?.? of correspondingly larger dimensions?

It should be noted that the lid could also_

be made by direct pressure into the body

.. DOlare, for which the support disc and the format disc may not be present, _

The tool also includes a 16mm pusher plunger.

and a means, known in itself, for moving the piston 16 downwards and upwards at the same time

1purpose. of^J<*>Q.rm?re_and_to press the lid into the body,

tubular of the container and to expand, the half-expanded piston, pressing in correlation with

>1<T>welding operation. The means 17 to .move.

_ the pressing piston?, preferably, a cylinder

Hydraulic or pneumatic or any other means, already known.

P_s.f~a.ntuffo_premente 16 includes a lower part..

0.8 which also acts as support for the expandable vehicle

19, and a top part 20 which is mounted around

to a portion of the lower part of the tree 18.

or 02 ja_lower and upper part of the piston?

^ and pressing are axially mobile with respect to each other, and they are shaped in such a way that the middle is...

?? ? . or expandable piston 19 expands when the lower part of the pressing piston and the upper part of the pressing piston are

move one towards the other. for juui ^i realizes the/?^-expansion of said expandable medium 19 so that

obtains a pressure surface as close as possible

possible in the common area of the <1 >orlo_7...and the 6th floor

of lid,_ _ _

? this purpose the lower part 18 of the piston

pressing and equipped with a very thin pressing horn, 2_1

the cheL ? inclined outwards and downwards

jjqiiie niagl?p Rostrate in 'Figs, 5 and 6<">, The part_?n-?Seriore 18 ? also equipped with' a yoluta_22 which is syi>

lupga ?d a certain distance radially in the part _

l6 -

i

lower and whose shape corresponds to the shape of the

expandable medium 19 in its non-expanded state

t

_ Preferably, the expandable medium is a ring 23

of rubber or any other suitable elastic material, and therefore the volute 22 is consequently of a circular cylindrical shape. The volute 22 can have an extension such as to enclose an arc between 90° and

1?<;>l60? of the rubber ring The lower end of the

I E < volute 22 ? directly connected to the surface B O <*>24, inclined outwards and downwards, of the <LJ>-fO ? ? ^ c pressing edge 21, The pressing edge 21 has a diameter

?-.-53=^O external which is so much smaller than the internal diameter -1 _5 ? n O.o3 ^ IO of the tubular body 1 of the container that the lid, ? > jwith easy sliding insertion, can be

^pressed downwards into the tubular body of the container. The outer diameter of the pressing edge, therefore, should be smaller than the inner diameter.

of the tubular body gives a value corresponding to the

double the thickness of the lid material,

increased by a^ tolerance game of 0.5 ~ 1%* The

upper part 20? movable externally to the part

lower _18 with wide sliding coupling

and should have a slightly larger outside diameter

g?ore of the outer diameter of the pressing edge 21, The

bottom edge of the lower part 20 and shaped

cup in 25 with a size corresponding to or greater than the diameter of the rubber ring 23? The shape

jdella superficie 25 d.oyreBhe be such _da. assign?*

re..to.the.rubber.ring. 23. a.pressure.line.est.r?*

the..26..as low as possible,._when 1<3>ring._yi

the compressed ones, and for this purpose the surface

za 25 l.ne.alla external surface lower than

to the internal surface of the upper part of 2.Q.

? < plunger, ? . . . . . . . . . . ?

LL S

iO i or As mentioned above, the carrier plate ? ? >-S KSE r= e 1h equipped with a lower guide cone 9_,_. e__li_at T. *** rc_eJ ^ p eo <? >l o<? >welding tool 10 has a straight taper 11 .? ~s ....!3. f o Q ?gz .? SP 1<1>high which-<.>connects directly with<^>the.widened cylindrical part, 12, The conical parts of the

bearing plate are very small. In one practical embodiment of the tool, intended for the ahtr?cation of a circular cup container of

baj?tpne with an internal diameter of 72.6 mm; the carrier plate ?.proyyista has a guide taper of? 7? while the welding tool 10, which has a height

d? 3.8mm, ? proyyisto d? a conicity? to widen?en

or upwards of 3?, which gives a tolerance in the enlarged cylindrical portion of approximately 0.2 mm, In a

form, practice of 'realization' of the invention? A container has been made with the same material both

?a ?-

tubular body

? fer which for the_.cpperc.hio,.is worth

say cardboard, which in the face destined to become

the inside of the container was lined with _un_lami^

ato_d? aluminum and weldable polyethylene*. Lo_. spe^

total thickness of the material was 0.5 mm. The container

had an internal diameter of 2.6 mm and the diameter.

<?>of the pressing edge 21 had been realized by 71.2 mn,

which means a tolerance of 0.4 mm in addition

eCd at a width of twice the thickness of the material<'>!_?_

s I The outer diameter of the upper part was 20 mm?

jto made without any tolerance and therefore it was..

li 71.6 mm, . . . . _ ? a *;* ? > After the tubular body 1 of the container is int.ro|

eighteen in the carrier plate 8, the piston 16 is

pressed down so that the lid blank 5 is shaped against the top edge

<Fllt >ua<r>oonane ?rounded edge of the disk or ring of formation.1 ,

and? as a result the lid is equipped with an or-_

i ?Q?<' >7 directed upwards* The piston is moved downwards by a predetermined distance which

? calculated in such a way that the surface area of?

Ilione dell'an-<.>ello di g <">omma 23 si vie:ne a t:royare pr???|

)rio in front of the welding ring 10* In the state of compression 1<1>rubber ring 25 of a surface ?i

eie.d? pressure,26, almost linear, right on line

<?>with 1*welding ring 10, After it has been supplied

{to heat in the welding ring 10. the ring d?

1rubber 23<'>expands with the moyime <">ntp..common-of-the-two.

parts. 18, 20, of the piston, pressing., in a way that

^the weldable layers of the tubular body and the lid

they melt together. The molten material has the ability to flow slowly both downwards and upwards.

I know the top, and the parts of the tubular body of the container? ?

9 < jfcore and of the edge . of the cover located above the- ? S SS or ai of the welding ring 10 have the possibility of e- O li- CO Z |-u <1 >-?>

^ Z3=. C spread slightly due to the self-regulation effect?? or o ? I 2 ie of the contact pressure, in .said, parts?.? The _.sal- !

<' >a 2? <0 dat ur a occurs^ in p_och?_s and seasoning, after it has had ? > erniine, the part 20 of the piston retreats away from the lower part 18 of the same, thus: _

that the 23-gauge ring regains its circular shape

i colare., its external surface being situ-ated] the inside of a line corresponding to the surface

p1aterna of the upper part 20, and the piston?

act of stepping back to be ready for a new cycle

As best illustrated in Fig* 6, the surface

?26.maximum pressure of the rubber ring 23 is found

It's very good, it's near the 6th floor of the lid and is basically right in front of the welding tool. 10 J

...During the 1st welding operation, the plasti-- -_|CQ layer of the cover will melt...together with the plastic layer of the tubular body, and some portions of the

plastic layers.. weldable breast pressed upwards

and yers.o.il.basso in order to..create portions in

_ thick .27.e.28 of material_.p.lastico.che_contrib.ui-?

__ _ 3are to...give.a satisfactory hermetic seal, to the co--hoop and the tubular body. After these are fused together, the upper edge 4.is bent inward as shown in Figs. 1 and 2. It is understood that the foregoing description and the forms of embodiment of the invention shown in the drawings are* - ? (0

<= a 5= ? no examples only .i.llu.s.tratiyi, and several modifications, ? >

i<"? >can be made within the scope of the claims

RI.yENPiCAZXON?_

Device ..for.the.forming and insertion, of.a _

_ inner lid in a tubular container and_.for_ ...

._....hermetically sealed connection of the lid to the internal surface of the tubular body of the container.

by welding, at constant heat, welding at constant heat

high frequency.0?ultrasonic welding comprising; ,and a bearing plate to support a..tubular body.-. re_.(.l)_.of the_container_while._the_lid. (6,. 7) is . introduced and secured by welding inside.

of the tubular body, a support (13) provided at _d?_

above the carrier plate _(8) for positioning

of a rough flat piece of lid (5), shaped

?for cutting, having a thin outer circumference

circumference of the inner circumference of the tubular body J,

a piston means_(16) to press the rough piece

zo d? lid (5) in the tubular body (1) while there??

fold up one edge (7) of the blank

of lid, ?1 piston means (16) comprising

a lower part (18) and an upper part (20) ? or

CO

, which are axially movable with respect to each other

and an expandable medium (19) between said two Parts (18, CO 1

f0) which is pressed radially outward when <3

jm > the two piston parts (18, 20) are moved as-I . <. >?

s?ally one__towards the other, characterized by what?

that the lower part (18) of the piston means (l6) 1 <t>o<e>n<a>n at its bottom is equipped with a thin pressing edge?

1(21) which goes all around, the upper surface

(24) of which is inclined outwards and towards

the bottom, creating a pressure surface for?

the expandable medium (19), and the upper part (20)

r ??<0" a >;<S'tan"UJ,f>? <(16) ? ep >.<assi>? <e >externally to a portion of the lower part

(l8), approaching and moving away from the contact

or with the expandable medium (19), the surface of

round of the upper part (20) being d-shaped?

cup (25)... . _ _ _

2. Device according to claim 1, characterised in that the expandable means (19) is an a^.

1 ring of rubber or similar elastic material, and the

lower part (18) of the pressing piston. (16) ?

a volute (22) cprya arch, the lower end

of which it is directly connected to the surface.

UJ Q

pie (24) inclined yersp outwards and downwards

55 co .detta voluta (22) having a radius that substantially coincides

?; <? >. <' " >- : fc*- or initially with the radius of the expanding ring (19)

? t or A in the state where the pressure on it is zero,

i ? > 3, Device according to claim 1 or.<.>2,

\

characterized by.what is the upper part (20) of the

'the pushing piston.(16) is parallel cylindrical and

jthe outer circumference from the pushing edge ( 1 )_ of the

<Q F ittl>au<ar>oonen<e >the lower part (_18) of the pressing piston is slightly lower than the outer circumference of the

|upper jarte (20)._ __

4. Device according to claim 1, 2 and <'>3?

.Ohso. .. fon?o_ (25J

cup-shaped upper part (20) of the_st?n^

;pressing force? located_at a lower level in the circumference. external with respect to the circumference

internal.

5. Device according to claim 1, characterized by a means for carrying out a welding

constant heat welding, a high frequency welding?"

za or an ultrasonic welder? A tool you know?

i . <? ? ? ? ?>. <? >. . . <? >. <? ? ? ? >datura (10) in the form of a metal ring which is

mounted in the carrier plate (8) substantially to the?"

the same level as the line in which the medium expands"

iile (19.) has its pressing surface (26) when

or the upper and lower part (l8, 20) of the

half a piston are compressed.

i - - . <. . . ?>

S, Device according to each of the preceding claims is characterised in that both the carrier plate (8) and the pressing piston (16) have substantially parallel cylindrical sides, so that the

welding pressure? is provided essentially only by the expandable medium (19_) within the defined zone?>

<Flt i>no<ir>oon n<a >a from the welding tool (10) of the por plate?;

iante.(8),

7. Device according to claim 5, characterized by what the welding ring (10) is?

?ga conically in the _verse_l<J>_up direction with an angle of about 2.-6.? and the_bearing plate (8) has^a car-r

y?t?.above: said welding ring (10) cprris|>pndenta_al major diameter, of the<J>welding ring

welding,

3. Device according to claim 5, charac-teristics

raised by what the carrier plate (8) has a car

? jvit? al _d? sj>pra of the welding ring (103 which. is slightly wider than the external circumference of the tubular body^ (1) to be welded, preferably wider}?? Dia_de_llp_0,5 1^A _ _ _ _

<" >f <? D1'3p0S?tiV0 Se'COna>? <la &>?<**!?>* <:i>? <e 0iI1,':re>

j7, characterized by what the bottom edge of the^

the welding ring (103 ? located in corresp

za. of the upper surface of the lid plane

|(6) or slightly above it,

10. Device according to each of the claims?

^ ? a o ? t ?6 a 9-?_. characterized by the fact that the bearing plate * J* <e >0 (8) has a shoulder at the upper end of its enlarged cylindrical part, a shoulder which

defines the maximum upper body position_

<F 31>OA <Rt>Monane -?tubular (1} of the container in the carrier plate,

<? . >i11, D?spositiyo se:condo ciascun de .l<">lVe riye.nd?cation ii

16 to 9., characterized by what the bearing plate

(8)_h _fortified in such a way that the upper edge-r

king, of the tubular body (10 in its fully inserted state? on the same plane with the upper edge)

higher than the bearing plate or develops jge.r a^

<">small distance above the said edge, in hand?e??

ra che.il lid f that is jyttenutq^ from a rough piece?

jZo lid plane (5) shaped by cutting, ^ provided with a rim bent circumferentially upwards as it is pushed into the tubular body (1) of the containeri _ _ _